Regarding bees in chimneys, Allen Dick wrote: > > 6 mesh hardware cloth should do the trick and reduce sparks, without > restricting draft at all. > > BTW 5 mesh hardware cloth is often used as an exclude as bees can pass > thru, leaving drones and queens behind. In the particular case worrying me at present the problem is that I can't easily get to the top. It's a two story building with the chimney above the ridge at one end. Unfortunately I can't get a ladder in at a safe angle to climb because of other buildings. I'd need to erect scaffolding. -- Malcolm Roe Phone : +44 1442 345104 Crosfield Electronics Ltd Fax : +44 1442 343000 Hemel Hempstead, Herts. HP2 7RH, UK E-mail : [log in to unmask] ------------------------------------------------------------------------